Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/sound/isa/sb/sb_common.c b/sound/isa/sb/sb_common.c
index 90b254a..ff031d6 100644
--- a/sound/isa/sb/sb_common.c
+++ b/sound/isa/sb/sb_common.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
  *                   Uros Bizjak <uros@kss-loka.si>
  *
  *  Lowlevel routines for control of Sound Blaster cards
- *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY; without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *   GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program; if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
- *
  */
 
 #include <linux/delay.h>
@@ -94,7 +80,7 @@
 
 static int snd_sbdsp_version(struct snd_sb * chip)
 {
-	unsigned int result = -ENODEV;
+	unsigned int result;
 
 	snd_sbdsp_command(chip, SB_DSP_GET_VERSION);
 	result = (short) snd_sbdsp_get_byte(chip) << 8;